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"XL" "xl" "EXTRA LOAD" or "RF"
'
'
'
on the sidewall.
Rim
means a metal support for a tire
or a tire and tube assembly upon
which the tire beads are seated .
Rim diameter
means nominal diameter of the
bead seat. If you change your
wheel size, you will have to pur-
chase new tires to match the new
rim diameter.
Rim size designation
means rim diameter and width.
Rim width
means nominal distance between
rim flanges.
Sidewall
means that portion of a tire be -
tween the tread and bead .
Speed rating (letter code)
means the speed at wh ich a tire is
designed to be driven for exten d-
ed periods of t ime . The ratings
range from 93 mph (150 km/h)
to 186 mph (298 km/h)
¢
table
on page 219.
You may not find
;;/ this information on all tires be-
,.,
;
cause it is not required by law.
V,
N
"'
...
Wheels
The speed rating letter code,
where applicable, is molded on
the tire sidewall and indicates the
maximum pe rmissible road
speeds
¢
&
in Winter tires on
page 233 .
Tire pressure monitoring
system*
means a system that detects
when one or more of a vehicle's
tires are underin fl ated and illum i-
na t es a low tire pressure wa rning
telltale.
Tread
means that port ion of a tire that
comes into contact with the road.
Tread separation
means pulling away of the tread
from the tire carcass .
Treadwear indicators (TWI)
means the projections within t he
principal grooves designed to give
a visua l indication of t he degrees
of wear of the tread . See
¢
page 226, Treadwear indicator
for mo re info rma t ion on measu r-
ing tire wear.
.,.
223
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